Jessica Chastain - Oscars 2012 Red Carpet

Jessica Chastain looks amazing on the red carpet of the 2012 Oscars held at the Hollywood & Highland Center on Sunday (February 26) in Hollywood.

The actress, who brought along her grandma Marilyn as her date, rocked an Alexander McQueen dress with Harry Winston jewels!

PHOTOS: Check out the latest pics of Jessica Chastain

Tonight, Jessica is nominated as Best Supporting Actress for her work in The Help.

Jessica found out about her nomination while at Paris Fashion Week!

Billy Crystal hosts the 2012 Oscars live TONIGHT at 8:30 p.m. ET/5:30 p.m. PT on ABC!